The number of chromosomes in Down's syndrome is
- A$23^{rd}$ pair with one less $= 45$
- B$21^{st}$ pair with one more $= 47$
- C$17^{th}$ pair with one more $= 47$
- DOne extra sex chromosome $= 47$
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View SolutionThe genotype of an individual with Down's syndrome is:
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View SolutionMatch Column $-I$ with Column $-II$ and select the correct option.
Column $-I$ Column $-II$ $(P)$ Turner syndrome $(i)$ Sex chromosome $(2n-1)$ $(Q)$ Down syndrome $(ii)$ Sex chromosome $(2n+1)$ $(R)$ Klinefelter syndrome $(iii)$ Autosomal $(2n+1)$
| Column $-I$ | Column $-II$ |
| $(P)$ Turner syndrome | $(i)$ Sex chromosome $(2n-1)$ |
| $(Q)$ Down syndrome | $(ii)$ Sex chromosome $(2n+1)$ |
| $(R)$ Klinefelter syndrome | $(iii)$ Autosomal $(2n+1)$ |
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